#stiffness

• Acampsia — A clinical pathological state manifested by extreme muscle rigidity, total inflexibility, or the complete loss of mobility in a joint or limb, preventing any form of flexion. This severe condition is often the result of bony ankylosis, retractile fibrous scarring following major trauma, or advanced spastic neurological disorders, requiring intensive physiotherapy or corrective surgery.
• Amyoplasia — A specific and most common form of arthrogryposis multiplex congenita, characterized by the defective muscular development or congenital absence of certain skeletal muscle groups, which are structurally replaced by fatty and fibrous tissue. This severe condition causes joint stiffness, symmetrical limb contractures, and reduced mobility from birth, typically without affecting the patient's intellectual development.
• Ankylo- — A combining form (prefixoid) derived from Greek (ankylos - crooked, bent, stiff, fused), used in medical and biological terminology to introduce the meaning of stiffness, ankylosis, abnormal fusion, unnatural curvature, or immobilization of a joint or anatomical structure.
• Ankylochely — A structural malformation or morphological feature specific to certain arthropods or mollusks, characterized by the fusion, ankylosis, or partial to total immobilization of the claws, chelicerae, or shell fold margins, preventing normal grasping movement or functional articulation of the appendages.
• Ankylodactyly — A rare congenital malformation or acquired condition (following severe trauma, burns, or destructive rheumatic processes), characterized by marked stiffness, total immobilization, or pathological fusion of the joints of one or more fingers or toes, leading to the loss of flexion and extension function.
• Ankylopoiesis — A progressive pathological process of formation, development, or induction of ankylosis within a joint; the biological mechanism through which synovial tissue and articular cartilage are gradually replaced by fibrous or bony tissue, leading to complete immobilization and stiffening of the affected joint structures.
• Ankylosis — A marked diminution or complete loss of mobility in a joint, occurring due to an intracapsular bony or fibrous fusion, caused by chronic inflammatory processes (rheumatism, arthritis), infections, severe trauma, or prolonged immobilization in bed or a plaster cast.
• Ankylosing — Causing, promoting, or accompanying ankylosis; causing progressive stiffening and permanent immobilization of the joints through fibrous or bony fusion. It is commonly used to describe severe forms of chronic autoimmune arthritis affecting the axial skeleton.
• Stiffening process — The act of becoming ankylosed and its result; the pathophysiological process or state through which a joint gradually or totally loses its mobility, becoming rigid due to fibrous or bony transformations.
• Ankylosed — Having undergone the process of ankylosis; a joint or part of the body that has become rigid, stiff, or devoid of mobility due to the pathological fusion of bones or intracapsular fibrous tissues. In a figurative sense, it describes a state of inactivity, spiritual stagnation, or lack of flexibility in a system or way of thinking.
• Arteriograph — A high-precision medical device used in radiology and cardiology to graphically record arterial pulsations or to visualize and photograph the lumen of arteries using X-rays, following the injection of a contrast medium. Additionally, in modern medicine, the term can also refer to non-invasive devices that measure arterial stiffness and pulse wave velocity to assess a patient's global cardiovascular risk.
• Arteriosclerosis — A chronic, degenerative vascular condition characterized by the thickening, stiffening, and loss of elasticity of arterial walls, a process often correlated with aging or mineral deposition within the tunica media of the vessels. This umbrella term encompasses atherosclerosis (lipid plaque formation in the endothelium) and Mönckeberg's arteriosclerosis (medial calcification), leading to reduced vascular compliance, elevated systolic pressure, and impaired blood flow to vital organs.
• Arterioxerosis — A degenerative pathological condition of the vascular system representing the drying, pronounced induration, or structural dehydration of arterial walls, frequently associated with the terminal stages of senile arteriosclerosis. This histological phenomenon involves the atrophy of elastic fibers, reduced nutrient supply through vasa vasorum, and complete loss of vascular flexibility, transforming large arteries into rigid and fragile tubes unable to buffer the heart's systolic shock wave.
• Arthrogryposis — A rare congenital condition characterized by the presence of multiple and fixed joint contractures, manifested by stiffness and severe limitation of mobility from birth. This non-progressive pathology, often associated with hypotrophy of the surrounding muscles, typically affects multiple body segments symmetrically and is caused by reduced intrauterine fetal movement during embryonic development.
• Arthrolysis — Surgical intervention consisting of the sectioning or destruction of fibrous adhesions, pathological scars, or retracted capsules within a joint, aiming to restore mobility lost due to ankylosis or prolonged immobilization. This joint release procedure can be performed either through a classic open approach or arthroscopically, and must be followed by an intensive functional rehabilitation program.
• Arthromyodysplasia — A rare congenital condition characterized by the abnormal, defective, or incomplete development of joint structures combined with volume or structural anomalies of the adjacent muscle tissue. This complex dysplasia leads to severe stiffness, limb mobility limitations, and muscle hypotrophy from the neonatal stage, possessing a genetic determination or being secondary to prolonged fetal immobilization in the uterus.